The World Health Organization has issued the first substantial rewrite of its dementia prevention guidance since 2019, and the practical headline for American households is that the list of things researchers have now formally assessed has grown considerably longer.
The second edition of the agency's guidelines on risk reduction of cognitive decline and dementia covers interventions addressing 20 potentially modifiable risk factors. The 2019 edition addressed 12. The new scope reaches into sleep, stroke, traumatic brain injury, vision impairment, HIV, and air pollution, none of which the earlier edition covered.
